GV. Pan, light aircraft taking off from Biggin Hill airport to demonstrate automatic navigation. They are using a new Decca device which improves the air safety. SV. Inside the aircraft looking over pilot and co-pilot's shoulders at the route chart. CU. The route chart where the course is being plotted. CU. Pilot, pan to route chart. CU. Course being plotted. GV. Mast at Biggin Hill. SV. Inside control tower where another route chart is operating. SCU. The course of the aircraft being plotted on the chart. CU. The course being plotted. CU. Pilot. SCU. Route chart showing the return course being plotted. GV. From aircraft, as it approaches runway. CU. Wheels touching down on runway. GV. The aircraft landing.